Adjustable Nose Bridges The nose bridges on some glasses
How to Use (Step by Step)
Focus on Eye Chart
With your Dial Vision glasses on, focus on the professional eye chart that's included with each pair.
Adjust Each Lens
While continuing to focus on the eye chart, use the dial on the outer left side of the glasses in order to adjust the left lens.
Following that, do the same thing on the right-hand side. If you've adjusted your lenses properly, you'll be able to see all the letters on the eye chart clearly.